Tree trimming machine



FIG. 1 is a side elevational view of a tree trimming machine showing my new design;

FIG. 2 is a side elevational view of the side opposite that shown in FIG. 1;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a top plan view thereof. 

The ornamental design for a tree trimming machine, as shown. 